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| Blu-ray and HD DVD Hardware, Software and Blank Media Discuss the new Blu-ray, HD DVD and combo burners, readers, and the playback software. Found new blank Blu-ray and HD DVD media in the market let us know! |
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01-06-2006
| #1 (permalink) |
| New on Forum Join Date: Jun 2006
Posts: 2
| Blu-ray Clarification Needed ASAP!!!! Hi all -- I'm new and I have a question. In an article written and posted on this site regarding the differences between Blu-ray and HD-DVD, they say one of the differences is the structure of the discs. The Blu-ray disc is composed of a 1.1 mm layer and .1 mm protective coating... the HD-DVD is composed of a .6 mm layer and .6 mm protective coating. The article says the reason the Blu-ray can hold more is because the laser only needs to go through .1 mm of space versus the HD-DVD of .6mm, therefore it can record more which means increased capacity... is that accurate???? -- I have been looking everywhere and can't seem to find someone (Blu-ray Disc Association or familiar) to confirm if that is true or not -- HELP!!! Please clarify if you know!! Thanks!! |
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02-06-2006
| #2 (permalink) |
| CDFreaks Resident Join Date: Feb 2005
Posts: 2,140
| Re: Blu-ray Clarification Needed ASAP!!!! If you look at your post you will see that two parts are in blue. Click on them and they will take you to articles on CD freaks that should give you more information and may even clarify it for you.
__________________ "I'm only happy when it rains, I feel good when things are going wrong, I only listen to the sad, sad songs, I'm only happy when it rains" (Garbage-"I'm Only Happy When It Rains") |
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02-06-2006
| #3 (permalink) | |
| Editor, Reviewer & Senior Moderator  Join Date: Dec 2003 Location: Austria
Posts: 3,063
| Re: Blu-ray Clarification Needed ASAP!!!! Quote:
NA (Numerical Aperture): higher NA (because of the lower distance from lens to recording layer) = smaller spot size (diameter of the laserbeam) compared to HD-DVD Because of this you can focus the laser with much higher precision and this allows to reduce the track pitch (distance between the centers of two adjacent tracks on a disc) and the pit length. = Higher data density = more capacity
__________________ Click here to checkout my Review PC USEFUL TOOLS: DVD Identifier | Nero CD/DVD Speed | MediaCodeSpeedEdit |KProbe 2 Found some interesting news on the web and they are related to optical storage? Don’t hesitate to tell us what you have found and use our news submit or post in our News Forum Help us to keep our Software Section up-to-date. Every related Software and changelog submit is welcome. Click here to join cdfreaks.com , 350 000+ people can't be wrong   The ultimate READ FIRST Last edited by H3rB3i; 02-06-2006 at 10:58. | |
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